Properties of the Number 810

Eight Hundred Ten

Basics

Value: 809 → 810 → 811

Parity: even

Prime: No

Previous Prime: 809

Next Prime: 811

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ⁴ × 5

Divisors: 1, 2, 3, 5, 6, 9, 10, 15, 18, 27

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100101010

Octal: 1452

Duodecimal: 576

Hexadecimal: 32a

Square: 656100

Square Root: 28.460498941515414

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

a(n) is the number of distinct reduced words of length n in the Coxeter group of "Apollonian reflections" in three dimensions. A154638

Average of twin prime pairs. A14574

List of totally balanced sequences of 2n binary digits written in base 10. Binary expansion of each term contains n 0's and n 1's and reading from left to right (the most significant to the least significant bit), the number of 0's never exceeds the number of 1's. A14486

Numbers all of whose prime divisors are consecutive primes starting at 2. A55932

Triangular array: the fusion of (x+1)ⁿ and (x+2)ⁿ; see Comments for the definition of fusion. A193722

Number of partitions of n into distinct and relatively prime parts. A78374

a(n) = n*(n+3). A28552

Numbers that are divisible by exactly 6 primes with multiplicity. A46306

a(n) = n²*(n+1). A11379

Expansion of g.f.: (1+x)/(1-9·x). A3952